What Is Qualified Small Business Stock? (w/Examples) + FAQs

This article reflects federal rules as of June 2026 and covers tax years 2025 and 2026. It also notes state rules for California and New Jersey. Tax law changes often — confirm current figures with the IRS or a licensed tax professional before you file or sell.

Quick Answer

Qualified Small Business Stock (QSBS) is stock in a U.S. C corporation that meets Internal Revenue Code Section 1202. If you hold it long enough, you can exclude up to 100% of your gain — as much as $15 million per company for stock acquired after July 4, 2025 — from federal income tax.

QSBS is one of the most powerful tax breaks in the entire code, and most founders and early investors never learn it exists until it is too late to plan. The catch is that the stock must meet strict rules before you ever sell, and a single misstep — the wrong entity type, the wrong holding period, or selling one year too soon — can turn a tax-free exit into a fully taxed one. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, made the break larger and easier to reach, but only for newly issued stock.

This matters now because startup exits are climbing again, and the rules split sharply on a single date. According to McDermott Will & Emery, stock acquired after July 4, 2025 follows a new tiered schedule that pays off in as little as three years, while older stock still needs a full five. Whether you are a founder, an employee with stock, or an angel investor, the version of the rules that applies to you depends entirely on when your shares were issued.

Here is what you will learn:

• 🧾 What QSBS is, in plain words, and exactly which stock qualifies under Section 1202.
• 📅 How the OBBBA’s new 3/4/5-year tiers differ from the old 5-year, all-or-nothing rule.
• 💰 How to calculate your exclusion with real dollar examples, including the $15 million cap.
• 🏛️ Why your state may still tax the gain — even when the IRS does not.
• 📝 How to report the exclusion on Form 8949 and Schedule D, plus the Section 1045 rollover escape hatch.

What QSBS Actually Means

Qualified Small Business Stock is a specific kind of stock that Congress created to reward people who invest early in small American companies. The reward is a break on capital gains tax when you sell. Capital gains tax is the tax you pay on the profit from selling an investment, and for high earners it can reach 23.8% at the federal level.

The rule lives in Section 1202 of the tax code, which Congress first passed in 1993. The idea was simple: if you risk your money on a young, growing business and hold the stock for years, the government will let you keep more of the gain. Over time, lawmakers made the break bigger, and the 2025 OBBBA made it the most generous it has ever been.

The consequence of not knowing about QSBS is steep. A founder who sells $10 million of qualifying stock without planning could pay roughly $2.4 million in federal tax — money that Section 1202 might have let them keep entirely. The break is not automatic in the sense that the IRS hands it to you; you must claim it correctly on your return, and the stock must have met every rule the whole time you held it.

A common misconception is that QSBS is only for venture capitalists. In reality, it most often helps startup founders and early employees who receive or buy stock when a company is small. If your shares qualify, the savings can dwarf almost any other tax move you make in your life.

What you should do about it: if you hold or expect to receive stock in a C corporation, ask the company whether it tracks QSBS eligibility, and keep records of your purchase date, your cost, and the company’s size from day one.

The Core Requirements, Broken Down

QSBS only works if the stock clears several tests at once. Miss one, and the stock simply is not QSBS — there is no partial credit for “almost.”

The Company Must Be a C Corporation

The issuing company must be a domestic C corporation — a regular U.S. corporation that pays its own tax — for substantially all of the time you hold the stock. As the Tax Adviser explains, an S corporation, an LLC taxed as a partnership, or a sole proprietorship cannot issue QSBS.

The consequence of the wrong entity is total: stock in an S corp or LLC will never qualify, no matter how long you hold it. This trips up many founders who form an LLC to save on early taxes, then later wish they had a C corp.

A real misconception is that you can fix this at sale time. You cannot retroactively make old stock qualify. What to do: if you plan to seek QSBS treatment, talk to a tax attorney about converting to a C corporation early, because the clock and the asset tests start at issuance.

The Gross-Assets Test ($50M or $75M)

The company’s total gross assets must stay at or below a ceiling when the stock is issued and right after. Under the OBBBA, that ceiling is $75 million for stock issued after July 4, 2025, up from $50 million for older stock, and it is indexed for inflation starting in 2027.

Gross assets means cash plus the value of other property the company holds, measured at the time of issuance. If the company is already over the limit when your stock is issued, your shares cannot be QSBS — even if the company shrinks later. This is why early shares matter most; a Series A investor often qualifies while a late-stage buyer does not.

A frequent misconception is that the test is measured at sale. It is measured at issuance. What to do: get the company’s gross-assets figure in writing as of your purchase date, because you will need it to defend the exclusion years later.

Original Issuance

You must acquire the stock at original issuance — directly from the company in exchange for money, property (other than stock), or services. As Millan and Co. notes, buying shares from another shareholder on the secondary market generally does not count.

The consequence of buying secondhand is that the stock loses QSBS status in your hands, even if it qualified for the original owner. There are narrow exceptions for gifts, inheritance, and certain partnership distributions, where the holding period and status carry over.

People often assume any startup stock they buy qualifies. What to do: confirm your shares came straight from the company’s treasury, and keep the subscription agreement or stock certificate showing original issuance.

The Active-Business Test and Excluded Industries

During substantially all of your holding period, at least 80% of the company’s assets must be used in an active qualified trade or business. Section 1202 excludes many service fields, including health, law, accounting, consulting, finance, brokerage, farming, hospitality, and any business where the main asset is the reputation or skill of its employees.

The consequence is that a law firm, a medical practice, or a hedge fund cannot issue QSBS, no matter its size. Tech, manufacturing, retail, and most product companies usually pass.

A common misconception is that “small business” alone qualifies. The industry matters as much as the size. What to do: if your company is in a gray area, get a written tax opinion before relying on the exclusion.

The Holding Period: Old Rule vs. New OBBBA Tiers

The holding period is where the OBBBA changed everything, and the rule that applies to you depends on the date your stock was issued — not the date you sell.

For stock acquired on or before July 4, 2025, the old rule still controls: you must hold for more than five years to exclude any gain at all. It is all-or-nothing — sell at four years and eleven months, and you get zero exclusion.

For stock acquired after July 4, 2025, the OBBBA created a tiered schedule: hold three years for a 50% exclusion, four years for 75%, and five or more years for the full 100%. This gives founders flexibility when a buyer forces an early sale.

There is an important catch in the new tiers. Gain excluded at the 3-year or 4-year level is taxed at a 28% rate on the included portion, not the usual 20% long-term rate. Only the full 5-year hold gives you a clean 100% exclusion with no special rate on the rest.

This single date creates two different worlds. Below is how the rules split.

Feature of Your Stock	What It Means for Your Tax
Issued on or before July 4, 2025	5-year hold required, $10M cap, $50M asset limit, all-or-nothing exclusion
Issued after July 4, 2025	3/4/5-year tiers (50/75/100%), $15M cap, $75M asset limit, indexed after 2026

How Much You Can Exclude: The Per-Issuer Cap

The exclusion is capped per company, per taxpayer. For stock acquired after July 4, 2025, the cap is the greater of $15 million or 10 times your adjusted basis in that company’s stock. For older stock, the cap is the greater of $10 million or 10 times basis.

Adjusted basis is generally what you paid for the stock. The “10 times basis” rule is what makes QSBS so powerful for people who invest real money — a $5 million investment can shelter up to $50 million of gain.

The consequence of the cap is that gain above it gets taxed normally. The $15 million figure is indexed for inflation starting in 2027, but married-filing-separately taxpayers get half — $7.5 million.

A common misconception is that the cap is per sale. It is a lifetime cap per company. What to do: track how much exclusion you have used for each company, because once you hit the cap for that issuer, future gains from it are fully taxable.

A Fully Worked Example

Let’s walk the math for stock that qualifies for the full 100% exclusion.

Suppose Maria buys $200,000 of original-issue QSBS in a tech C corporation in 2019. The company had $8 million in gross assets at issuance, well under the $50 million limit. In 2026, after holding more than five years, she sells for $9 million.

Her gain is $9,000,000 minus $200,000, or $8,800,000. Her cap is the greater of $10 million or 10 times her $200,000 basis ($2 million), so her cap is $10 million. Her entire $8.8 million gain is below the cap, so 100% is excluded. Maria pays $0 in federal tax on the sale — saving roughly $2.1 million at the 23.8% top federal rate.

Now suppose Devin invests $1 million in 2026, after the OBBBA date, in a company with $40 million in gross assets. He sells in 2029 — exactly three years later — for $13 million. His gain is $12 million. Because he held only three years, he gets the 50% exclusion: $6 million is tax-free. The other $6 million is taxed at the special 28% rate, costing him about $1.68 million plus the 3.8% net investment income tax. Had he waited two more years to hit five years, the full $12 million (under his $15 million cap) would have been tax-free.

Which Situation Applies to You?

The right path depends on who you are and when you got your stock. Use this to find your lane.

• Founder with pre-July 2025 stock: You face the strict 5-year, all-or-nothing rule and the $10M cap. Do not sell before year five unless you plan a Section 1045 rollover.
• Founder or employee with post-July 2025 stock: You can exit as early as three years for a partial break, with a larger $15M cap. Track your issuance date carefully.
• Angel or VC investor: The “10x basis” cap likely matters more to you than the dollar cap. Consider spreading investments across multiple issuers to multiply caps.
• Holder in California or New Jersey: The state may tax the gain even when the IRS does not — read the state section below before you sell.
• Sold too early by accident: A Section 1045 rollover within 60 days may save you. See the rollover section.

State Conformity: California and New Jersey

The federal exclusion does not bind the states, and your home state at the time of sale decides whether you also get a state break. According to a state-by-state analysis, most states with an income tax follow federal QSBS rules, but a handful do not.

California does not conform to Section 1202. The QSBS Expert resource confirms that California fully taxes QSBS gains at its regular rates, which top out above 13%. So a California founder with a $10 million federally tax-free gain could still owe more than $1 million in state tax. The only way to avoid it is to become a non-resident of California before the sale — and the state scrutinizes such moves closely.

New Jersey historically did not allow the exclusion either, though recent guidance has moved toward partial conformity. Because the state treatment is unsettled and changing, a New Jersey holder should confirm the current rule with the New Jersey Division of Taxation before relying on any state break.

The consequence of ignoring state law is a surprise bill that can reach seven figures. What to do: check your state’s conformity early, and if you live in a non-conforming state, talk to an advisor about residency timing well before you sign a sale agreement.

Where You Live When You Sell	State Tax on QSBS Gain
California	No conformity — full state tax on the gain at rates above 13%
New Jersey	Historically no break; partial conformity is evolving — confirm current rule

The Section 1045 Rollover: A Second Chance

If you must sell QSBS before you hit your full holding period, Section 1045 lets you defer the gain by rolling it into new QSBS. Think of it as a like-kind exchange just for small business stock.

The rules are tight. Per Plante Moran, you must have held the original QSBS for at least six months, you must reinvest the proceeds in replacement QSBS within 60 days of the sale, and you must make a formal election on a timely filed return. Your old basis and holding period carry over to the new stock.

The consequence of missing the 60-day window is that the deferral is lost and the gain becomes fully taxable. The 60-day clock is the biggest practical hurdle, so the replacement investment must be lined up before you sell.

A misconception is that you can roll into anything. The replacement must itself be QSBS. What to do: identify a qualifying replacement company in advance, and make the election on your return for the year of the original sale, including extensions.

How to Report QSBS on Your Tax Return

Reporting happens on Form 8949 and Schedule D, and the mechanics matter because the IRS will not apply the exclusion for you.

You report the sale in Part II (long-term) of Form 8949. As accounting guidance explains, you enter the proceeds and your cost basis as the broker reported them, then enter code “Q” in column (f) and the excluded amount as a negative number in column (g). That negative adjustment is what zeros out the excluded gain.

The totals flow to Schedule D, and the 28% Rate Gain Worksheet captures any portion taxed at the special 28% rate. If you used a Section 1045 rollover, you report the sale similarly but elect deferral rather than exclusion. What to do: keep your purchase records, the company’s gross-assets statement, and your holding-period proof for at least three years after you file, since QSBS claims draw IRS attention.

Deadlines, Costs, and Timing

QSBS planning is about timing, and the deadlines are unforgiving. The five-year clock (or the 3/4/5-year tiers for newer stock) runs from your issuance date, and selling one day early can cost the entire break.

The Section 1045 rollover gives you only 60 days to reinvest after a sale — a window so short it must be planned in advance. Reporting happens on your normal return deadline, April 15, or October 15 with an extension.

On cost, a straightforward QSBS sale can be reported by a competent CPA for a few hundred to a couple thousand dollars. A complex exit — stacking exclusions, a rollover, or a residency change — often warrants a tax attorney, which can run several thousand dollars but can save millions.

Mistakes to Avoid

• Forming an LLC or S corp instead of a C corp. Stock in these entities is never QSBS, so the exclusion is lost from the start.
• Selling one day before your holding period ends. Pre-July 2025 stock sold at year four years and eleven months gets zero exclusion.
• Buying stock on the secondary market. Shares not acquired at original issuance usually fail the test, costing you the full break.
• Ignoring the gross-assets ceiling. If the company exceeded $50M (or $75M for newer stock) at issuance, your shares never qualified.
• Assuming your state follows the IRS. California fully taxes the gain, which can mean a surprise seven-figure state bill.
• Missing the 60-day Section 1045 window. A late rollover turns a deferred gain into a fully taxed one.
• Failing to enter code “Q” on Form 8949. Without the negative adjustment, the IRS taxes the full gain and you must amend.
• Not keeping issuance records. Without proof of date, basis, and company size, you cannot defend the exclusion on audit.

Do’s and Don’ts

• Do confirm C corporation status before investing, because only C corp stock can ever be QSBS.
• Do get the company’s gross-assets figure in writing at issuance, since you will need it to prove eligibility years later.
• Do track your holding period to the day, because the five-year line is absolute for older stock.
• Do check your state’s conformity early, so a non-conforming state like California does not surprise you.
• Do consult a tax pro before a large exit, since stacking and rollovers can multiply your savings.
• Don’t buy QSBS on the secondary market expecting the break, because original issuance is required.
• Don’t sell before your tier vests, as an early sale forfeits part or all of the exclusion.
• Don’t assume the $15M cap applies to old stock, because pre-July 2025 shares are capped at $10M.
• Don’t forget the 28% rate on partial exclusions, since the included gain is taxed higher than usual.
• Don’t rely on memory at filing time, because missing records can sink an otherwise valid claim.

Pros and Cons of Relying on QSBS

• Pro — Up to 100% federal exclusion, which can erase millions in capital gains tax on a startup exit.
• Pro — A high cap, the greater of $15M or 10x basis, shelters even very large gains for newer stock.
• Pro — Faster payoff under OBBBA, with partial breaks available in just three years.
• Pro — A rollover safety net, since Section 1045 can defer gain if you must sell early.
• Pro — Stacking is possible, because the cap is per taxpayer, so gifting shares to family can multiply exclusions.
• Con — Rigid requirements, since one failed test voids the entire exclusion.
• Con — Long holding periods, which lock up your capital for years.
• Con — State traps, because non-conforming states like California still tax the gain.
• Con — The 28% rate on partial exclusions, which dulls the benefit of an early sale.
• Con — Heavy recordkeeping, since you must document eligibility for years to survive an audit.

What to Do Next

1. Confirm your company is a domestic C corporation and that your shares came from original issuance.
2. Get a written statement of the company’s gross assets as of your purchase date.
3. Record your exact issuance date and adjusted basis, and note whether your stock is pre- or post-July 4, 2025.
4. Check whether your state (especially California or New Jersey) conforms to Section 1202.
5. Before selling, map your holding period against the tiers, and if you must sell early, arrange a Section 1045 replacement in advance.
6. At filing, report the sale on Form 8949 with code “Q” and carry the totals to Schedule D.
7. For any sale above a few million dollars, or any rollover or residency move, hire a CPA or tax attorney — the planning involves the gross-assets test, stacking, and state residency, and the savings far exceed the fee.

This article is educational and not a substitute for advice from a licensed tax professional for your specific situation.

FAQs

What is qualified small business stock? QSBS is stock in a U.S. C corporation that meets Section 1202. If held long enough, you can exclude up to 100% of the gain from federal tax, capped at $15 million for stock acquired after July 4, 2025.

Does an LLC qualify for QSBS? No. Only domestic C corporations can issue QSBS. An LLC or S corporation cannot, though converting to a C corp before issuing new stock can start eligibility going forward.

How long must I hold QSBS? Five years for the full 100% exclusion. For stock acquired after July 4, 2025, you can get 50% at three years and 75% at four years under the OBBBA tiers.

How much gain can I exclude? The greater of $15 million or 10 times your basis for stock acquired after July 4, 2025. For older stock, the cap is the greater of $10 million or 10 times basis, per company.

Did the OBBBA change QSBS? Yes. Effective July 4, 2025, it added 3/4/5-year tiers, raised the cap to $15 million, and lifted the gross-assets limit to $75 million, all indexed for inflation starting in 2027.

Does California tax QSBS gains? Yes. California does not conform to Section 1202 and fully taxes the gain at rates above 13%, even when the federal exclusion is 100%.

What industries cannot issue QSBS? Service fields like health, law, finance, and consulting. Section 1202 excludes businesses whose main asset is employee skill or reputation, along with farming, hospitality, and brokerage.

What is a Section 1045 rollover? A way to defer QSBS gain. If you held the stock six months and reinvest the proceeds in new QSBS within 60 days, you can defer the gain and carry over your basis.

How do I report QSBS on my return? On Form 8949 and Schedule D. Enter code “Q” in column (f) and the excluded gain as a negative number in column (g), then carry the totals to Schedule D.

Is the partial exclusion taxed differently? Yes. The included portion of a 50% or 75% exclusion is taxed at a 28% rate, higher than the usual 20% long-term capital gains rate.

Can I buy QSBS from another shareholder? No, generally. You must acquire the stock at original issuance directly from the company. Secondary-market purchases usually do not qualify, with narrow exceptions for gifts and inheritance.

What is the gross-assets limit? $75 million for stock issued after July 4, 2025. It was $50 million before that date, measured at and immediately after issuance, and is indexed for inflation starting in 2027.